scholarly journals Effect of Surface Orientation on Methanol Adsorption and Thermally Induced Structural Transformations on Copper Surfaces

2021 ◽  
Author(s):  
Roey Ben David ◽  
Adva Ben Yaacov ◽  
Baran Eren
Keyword(s):  
Structural Transformations ◽  
Surface Orientation ◽  
Copper Surfaces ◽  
Thermally Induced ◽  
Methanol Adsorption ◽  
Effect Of Surface

Effect of Surface Roughness on Pool Boiling Heat Transfer of Water on a Superhydrophilic Aluminum Surface

2017 ◽  
Vol 139 (10) ◽  
Author(s):  
Jinsub Kim ◽  
Seongchul Jun ◽  
Jungho Lee ◽  
Juan Godinez ◽  
Seung M. You
Keyword(s):  
Heat Transfer ◽  
Surface Roughness ◽  
Boiling Heat Transfer ◽  
Aluminum Surface ◽  
Transfer Coefficients ◽  
Copper Surfaces ◽  
Heat Transfer Coefficients ◽  
Superhydrophilic Surface ◽  
Aluminum Surfaces ◽  
Effect Of Surface

The effect of surface roughness on the pool boiling heat transfer of water was investigated on superhydrophilic aluminum surfaces. The formation of nanoscale protrusions on the aluminum surface was confirmed after immersing it in boiling water, which modified surface wettability to form a superhydrophilic surface. The effect of surface roughness was examined at different average roughness (Ra) values ranging from 0.11 to 2.93 μm. The boiling heat transfer coefficients increased with an increase in roughness owing to the increased number of cavities. However, the superhydrophilic aluminum surfaces exhibited degradation of the heat transfer coefficients when compared with copper surfaces owing to the flooding of promising cavities. The superhydrophilic aluminum surfaces exhibited a higher critical heat flux (CHF) than the copper surfaces. The CHF was 1650 kW/m2 for Ra = 0.11 μm, and it increased to 2150 kW/m2 for Ra = 0.35 μm. Surface roughness is considered to affect CHF as it improves the capillary wicking on the superhydrophilic surface. However, further increase in surface roughness above 0.35 μm did not augment the CHF, even at Ra = 2.93 μm. This upper limit of the CHF appears to result from the hydrodynamic limit on the superhydrophilic surface, because the roughest surface with Ra = 2.93 μm still showed a faster liquid spreading speed.

Solid-state dynamics and single-crystal to single-crystal structural transformations in octakis(3-chloropropyl)octasilsesquioxane and octavinyloctasilsesquioxane

2017 ◽  
Vol 19 (40) ◽  
pp. 27516-27529 ◽  
Author(s):  
A. Kowalewska ◽  
M. Nowacka ◽  
M. Włodarska ◽  
B. Zgardzińska ◽  
R. Zaleski ◽  
...  
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Structural Transformations ◽  
Crystal Lattices ◽  
Thermally Induced ◽  
Crystal Structural

Thermally induced formation of symmetric crystal lattices in functional POSS proceeds via different mechanisms and results in unique reversible phenomena.

Effect of surface orientation of CdxHg1−x Te crystals on the properties of surface anodic oxides

2001 ◽  
Vol 35 (11) ◽  
pp. 1279-1281 ◽  
Author(s):  
V. G. Sredin ◽  
Yu. S. Mezin ◽  
V. M. Ukrozhenko
Keyword(s):  
Surface Orientation ◽  
Effect Of Surface

Epitaxial Graphene Growth on α-SiC: Probing the Effect of Surface Orientation

2011 ◽  
Vol 3 (1) ◽  
pp. 49-54 ◽  
Author(s):  
N. Camara ◽  
B. Jouault ◽  
A. Caboni ◽  
A. Tiberj ◽  
P. Godignon ◽  
...  
Keyword(s):  
Epitaxial Graphene ◽  
Surface Orientation ◽  
Graphene Growth ◽  
Effect Of Surface

Thermally induced structural transformations of a series of palladium(II) complexes with N-heteroaromatic bidentate hydrazone ligands

2014 ◽  
Vol 592 ◽  
pp. 23-30 ◽  
Author(s):  
Nebojša Begović ◽  
Vladimir A. Blagojević ◽  
Sanja B. Ostojić ◽  
Darko M. Micić ◽  
Nenad Filipović ◽  
...  
Keyword(s):  
Structural Transformations ◽  
Thermally Induced ◽  
Hydrazone Ligands

Effect of surface orientation on the kinetics of polymer swelling

1971 ◽  
Vol 4 (5) ◽  
pp. 433-434 ◽  
Author(s):  
I. I. Agulov ◽  
P. V. Nazarenko ◽  
F. I. Skripnik
Keyword(s):  
Surface Orientation ◽  
Polymer Swelling ◽  
Kinetics Of ◽  
Effect Of Surface

scholarly journals Thermal Reactivity in Metal Organic Materials (MOMs): From Single-Crystal-to-Single-Crystal Reactions and Beyond

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4088
Author(s):  
Javier Martí-Rujas
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Organic Materials ◽  
Structural Transformations ◽  
Atomic Motion ◽  
X Ray Diffraction ◽  
Thermally Induced ◽  
X Ray ◽  
Thermal Reactivity ◽  
Metal Organic

Thermal treatment is important in the solid-state chemistry of metal organic materials (MOMs) because it can create unexpected new structures with unique properties and applications that otherwise in the solution state are very difficult or impossible to achieve. Additionally, high-temperature solid-state reactivity provide insights to better understand chemical processes taking place in the solid-state. This review article describes relevant thermally induced solid-state reactions in metal organic materials, which include metal organic frameworks (MOFs)/coordination polymers (CPs), and second coordination sphere adducts (SSCs). High temperature solid-state reactivity can occur in a single-crystal-to-single crystal manner (SCSC) usually for cases where there is small atomic motion, allowing full structural characterization by single crystal X-ray diffraction (SC-XRD) analysis. However, for the cases in which the structural transformations are severe, often the crystallinity of the metal-organic material is damaged, and this happens in a crystal-to-polycrystalline manner. For such cases, in the absence of suitable single crystals, structural characterization has to be carried out using ab initio powder X-ray diffraction analysis or pair distribution function (PDF) analysis when the product is amorphous. In this article, relevant thermally induced SCSC reactions and crystal-to-polycrystalline reactions in MOMs that involve significant structural transformations as a result of the molecular/atomic motion are described. Thermal reactivity focusing on cleavage and formation of coordination and covalent bonds, crystalline-to-amorphous-to-crystalline transformations, host–guest behavior and dehydrochlorination reactions in MOFs and SSCs will be discussed.

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